source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/EBIOS.inc@ 221

Last change on this file since 221 was 221, checked in by aitotat@…, 13 years ago

Changes to XTIDE Universal BIOS:

  • AH=0Ch (Seek) should work properly again.
  • More than 127 sectors are no longer allowed for EBIOS functions.
  • Changed location for BOOTNFO structs.
File size: 2.1 KB
Line 
1; Project name : XTIDE Universal BIOS
2; Description : Equates used in Enhanced INT 13h functions (EBIOS).
3%ifndef EBIOS_INC
4%define EBIOS_INC
5
6; EBIOS specification returned by INT 13h, AH=41h
7EBIOS_VERSION EQU 21h ; 21h = EDD version 1.1
8
9; Support bits returned by INT 13h, AH=41h
10ENHANCED_DRIVE_ACCESS_SUPPORT EQU (1<<0) ; 41h, 42h, 43h 44h, 47h and 48h are available
11DRIVE_LOCKING_AND_EJECTING_SUPPORT EQU (1<<1) ; 41h, 45h, 46h, 48h, 49h are available and INT 15h, AH=52h
12ENHANCED_DISK_DRIVE_SUPPORT EQU (1<<2) ; 41h, 48h, 4Eh are available (EDD)
13
14
15; Extended Drive Information returned by AH=48h
16struc EDRIVE_INFO
17 .wSize resb 2 ; 0, Size of this buffer, at least 26
18 .wFlags resb 2 ; 2, Information flags
19 .dwCylinders resb 4 ; 4, Total number of addressable cylinders
20 .dwHeads resb 4 ; 8, Total number of addressable heads
21 .dwSectorsPerTrack resb 4 ; 12, Number of sectors per track
22 .qwTotalSectors resb 8 ; 16, Total number of addressable sectors
23 .wSectorSize resb 2 ; 24, Number of bytes per sector
24 .fpEDDparams resb 8 ; 26, Optional pointer to Enhanced Disk Drive (EDD) configuration parameters
25endstruc
26
27MINIMUM_EDRIVEINFO_SIZE EQU 26 ; 26 bytes does not include EDD pointer
28
29; Flags for EDRIVE_INFO.wFlags
30FLG_DMA_BOUNDARY_ERRORS_HANDLED_BY_BIOS EQU (1<<0)
31FLG_CHS_INFORMATION_IS_VALID EQU (1<<1)
32FLG_REMOVABLE_DRIVE EQU (1<<2)
33FLG_WRITE_WITH_VERIFY_SUPPORTED EQU (1<<3)
34FLG_CHANGE_LINE_SUPPORT EQU (1<<4) ; Removable media only
35FLG_LOCKABLE EQU (1<<5) ; Removable media only
36FLG_NO_MEDIA_PRESENT_AND_CHS_SET_TO_MAX EQU (1<<6) ; Removable media only
37
38
39; Disk Address Packet for read, write and verify functions
40struc DAP
41 .bSize resb 1 ; 0, Size of this packet in bytes
42 .bReservedAt1 resb 1 ; 1, Currently unused, must be zero
43 .wSectorCount resb 1 ; 2, Number of sectors to process (0...127)
44 .dwMemoryAddress:
45 .wOffset resb 2 ; 4, Memory offset for transfer
46 .wSegment resb 2 ; 6, Memory segment for transfer
47 .qwLBA resb 8 ; 8, Starting sector for transfer
48endstruc
49
50MINIMUM_DAP_SIZE EQU 16
51
52
53%endif ; EBIOS_INC
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